Method of sinking, lining, and cementing shafts.



P. A. LEGRAND.

7 METHOD OF SINKING, LINING, AND GEMENTING sums.

I APPLICATION rum SEPT. 16, 1909.

Patented'Jan. 16, 1912.

2 sums-sum 1.

Inventor Witnesses flttomey.

COLUMBIA PLANOIJRAPHICOH WASHINGTON, D. c.

P. A. LEGRAND. METHOD OF SINKING, LINING, AND OEMENTING SHAFTS.

APPLIUATION FILED SEPT. 16, 1909.

Patented Jan. 16, 1912.

Fig. 2.

M E E H J N E E H S 6 5 6 I 4 1 0 ,v 1

I Inventor I Z%/@M Witnesses .dttorney.

PAUL ALBERT LEGRAND,

OF BRUSSELS, BELGIUM.

METHOD OF SINKING, LINING, AND CEMENTING SHAFTS.

Specification of Letters Patent. A

Application filed September 16, 1909.

PatentedJan. 16, 1912.

Serial No. 518,034.

To all whom, it may concern Be it known that I, PAUL ALBERT LE- GRAND, asubject of the King of Belgium, residing at 5 Rue Desseqz, Brussels,Belglum, have invented certain new and useful Improvements Relating tothe Methods of Sinking, Lining, and cementing Shafts, of which thefollowing is a specification.

Hitherto several methods have been employed for cementing or liningmine-shafts sunk in watery soil in order to facilitate the sinkingoperation. been made in the section of the shaft or on the exterior ofthe latter, and, according to one method of procedure, the holes arebored to their full depth and cement injected into the surroundingwatery soil through the finished holes, while according to anothermethod, the holes are bored in sections of convenient depths, dependingon the strata, and cement injected after the completion of each section.According to a third method the cementing operation is carried out simultaneously with the boring operation. The work of deepening the shaft,however, has always been commenced after the completion of the cementingoperation, and after the mouth of the shaft has been completely clearedof the apparatus for boring and cementing. The whole of the timeemployed in making the bore holes and in cementing, together with theother necessary operations, is therefore lost as regards the deepeningof the shaft. These operations, however, of boring and cementing maytake considerable time, especially when a deep shaft is to be sunk.

The present invention has for its object i to avoid this loss of time,by deepening the shaft simultaneously with the formation of the circleof bore holes, and the injection of cement into the soil by means of thelatter.

The invention is illustrated in the accompanying drawings in which aFigure 1 shows a section of the shaft, and the apparatus in elevation.Fig. 2 is a plan view.

1 are the rails.

2 is the boring engine.

3 is the cementing apparatus.

All the bore holes are formed on the exterior of the shaft itself. Theboring appa ratus is or are also provided around the edge Thus 1 boreholes have 4 of the shaft itself, so as to leave the mouth free for thework of deepening the shaft.

The cementing of the soil around the shaft is effected spirally downwardin the manner that the first hole is bored a certain distance downward,the second hole a little deeper than the first, the third a littledeeper than the second and so on. In order that the work of deepeningthe shaft may always be eifected in soil that-is surrounded by wellcemented soil, capable of preventing the passage of water from thesurrounding Watery so-il into the shaft as it is deepened the work ofboring and cementing is carried out in advance of the work of deepeningthe shaft, to an extent depending upon the particular conditions underwhich the work is carried out. For this purpose the drill or drills passfrom one bore hole to the next, and they are therefore mounted.

on wheels and run on circular rails around the mouth of the shaft. Anyusual type of boring apparatus can in this way be mounted on wheels ifmade light and of small size, but for cementing purposes I prefer rotarydrills to the hammer type of borer, since rotary drills are less liableto deposit slime,

and cause less agitation in the water current;

than the hammer type of borer which is liable to fill with slime thecracks or crevices in the "soil, which should be filled with cement.Further any type of cement reservoir may be mounted on the rails andmoved successively to the different bore holes.

In order that the men engaged upon the boring, cementing, winding andother work shall not inconvenience one another some of the operationscan be carried out at different levels as shown in Fig. 1 where thewinding gear is disposed at a higher level than the gear for the otherwork.

What I claim as my invention and desire to secure by Letters Patentis 1. The method of sinking shafts in waducing the cementing materialthrough the cementing the soil in a spiral direction In testimonywhereof I have hereunto signed my'name to this specification in thepresence of tWo' subscribing Witnesses.

PAUL ALBERT LEGRAND.

Witnesses:

GREGORY PHELAN, JAMES M. G. FAY,

bore, holes.

3. The method of sinking shafts in Watery soil consisting in boring theholes and in around the shaft simultaneously With the sinking of theshaft.

Gopies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G. J

